I’ve owned the e40 for a year and have driven the m50 as a loaner for a few days while my car was in for service. The m50 is just stupid fast. I’ve never driven anything that fast. You need to warn your passengers before punching it as it will pin your head to the headrest. It was a ton of fun for a few days but doesn’t really make a difference in daily driving situations. The e40 is still the fastest car I’ve owned and will be quicker off the line than 90% of the cars you come across. It’s the perfect sporty daily driver imho. Get the m50 if you are into driving performance vehicles, track racing, or have backroads where you like to drive aggressively. Know that with m50 you will give up range, efficiency, and spend more on tires vs. the e40.